Regarding Jack Plavcan's question about his 235's prop.

Jack, if memory serves me right, your 58X70 sounds quite short. Before I
changed to a MT, I tried three different mfg's props (Aymar-Demuth, Props
Inc.and the Ivoprop variable-pitch) and I think they were all 62 inch
diameter (don't remember the pitch for the fixed pitch units but I think it
was maybe 72 in. - Prop's Inc. unit is in storage and I'll look next week
when I return from fishing).

I could never get the Ivoprop to quit breaking the hub stress tell-tales and
returned it to the mfg. (The tell-tales indicate relative movement between
the individual blades at the root attachments). It's a great idea and if you
can make it work on your airplane, I think you'd like it. Just be sure to
get a committment from Ivo that if you can't keep the tell-tales from
breaking, it can be returned.

With both of the fixed props, I turned approx. 2350 -2450 RPM on start of
take-off (at sea level) and as I accelerated, it would run up to about 2650
for cruise. With this little engine, I flight planned for about 160 knots so
I figured my prop was working pretty good. Of course, take-offs were not too
sprightly with the static RPM so low but I was careful and I enjoyed the
cruise.

Incidentally, I do not recommend the Aymar-Demuth as I had two of them fail,
one catastrophically just at rotation, at a lamination glue line. Very
scary!

The Props Inc. unit is quite a bit more robust and Jeff (at P.I.) reworked
his first cut to bring the RPM up a little for just the shipping charges. I
didn't put many hours on it before changing to the MT but I liked it.

Of course, if you can do it, the MT electric C/S two-bladed prop is the
perfect match for the 235 airframe.

Good luck,

Dan Schaefer
Early 235, N235SP